# EA2224

**Everanalog IC design** · DC-DC Converters · TDFN-14-EP(3x4)

EA2224 from Everanalog IC design, in a TDFN-14-EP(3x4). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VINA | power_in | IC analog power supply input, 2.7V to 5.5V operating range. Powers the internal control/logic; typically tied to VIN through a small RC filter. |
| 2 | GND | power_in | Chip analog ground reference for the control circuitry. |
| 3 | FB | input | Voltage feedback input. For adjustable versions, connect to an external divider (VFB = 500mV typical); for fixed 3.3V versions, tie directly to VOUT. |
| 4 | VOUT | power_out | Power output of the Buck-Boost converter, 2.8V to 5.5V (or fixed 3.3V). Pins 4 and 5 must be tied together and bypassed with output capacitors. |
| 5 | VOUT | power_out | Power output of the Buck-Boost converter (paralleled with pin 4 for current handling). |
| 6 | LXU | passive | Inductor switch node on the up-converter (boost) side. Pins 6 and 7 must be tied together and connected to one terminal of the external inductor. RON typ 50mΩ. |
| 7 | LXU | passive | Inductor switch node on the up-converter (boost) side (paralleled with pin 6). |
| 8 | LXD | passive | Inductor switch node on the down-converter (buck) side. Pins 8 and 9 must be tied together and connected to the other terminal of the external inductor. RON typ 50mΩ. |
| 9 | LXD | passive | Inductor switch node on the down-converter (buck) side (paralleled with pin 8). |
| 10 | VIN | power_in | Power input of the Buck-Boost converter, 2.7V to 5.5V. Pins 10 and 11 must be tied together and bypassed with input capacitors. |
| 11 | VIN | power_in | Power input of the Buck-Boost converter (paralleled with pin 10 for current handling). |
| 12 | EN | input | Enable input (1 = enabled, 0 = disabled). VIH >= 1.2V, VIL <= 0.4V. Must not be left open. |
| 13 | PS/SYNC | input | Dual-function control: Power-Save mode select (1 = disabled/FPWM, 0 = enabled) OR external clock input for synchronization (4.4-5.2MHz range). Must not be left open. |
| 14 | PWRGD | output | Power Good indicator, open-drain output (1 = good, 0 = failure). Asserts when VOUT >= ~95% of VOUT,SET; requires external pull-up. |
| 15 | PGND | power_in | Power ground of the Buck-Boost converter (exposed thermal pad). Must be soldered to a large PCB copper area connected to PGND for maximum power/thermal dissipation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Everanalog IC design |
| Package | TDFN-14-EP(3x4) |
| Category | PMIC |
| Pins | 15 |

## Ordering variants

Same part, different packaging or reel option.

- `EA2224K`

## CAD (KiCad official)

- Symbol: `EA2224`
- Footprint: `Package_DFN_QFN:DFN-14-1EP_3x4mm_P0.5mm_EP1.7x3.3mm`
- 3D model: TDFN-14-EP(3x4) (KiCad packages3D, STEP)
- 3D model files: `ea2224-etched.step` / `ea2224-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ea2224.step` / `ea2224.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Everanalog IC design datasheet](docs/ea2224-datasheet.pdf) (12 pp, sha256 `46f42b31d1738b26`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ea2224-datasheet.pdf)